<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="logo" />
        <span>电商管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主题区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse?'64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#ffd04b" :unique-opened="true" :collapse="isCollapse" :collapse-transition="false" :router="true" :default-active="$route.path">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
            <template slot="title">
              <i :class="iconsObj[item.id]"></i>
              <span>{{item.authName}}</span>
            </template>

            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id">
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  components: {},
  data() {
    return {
      //左侧菜单数据
      menulist:[],
      iconsObj:{
        '125':'iconfont icon-user',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao'
      },
      isCollapse:false  //左侧菜单栏是否折叠
    };
  },
  created(){
    //页面一加载立即展示左侧菜单
    this.getMenuList()
  },
  methods: {
    logout(){
      window.sessionStorage.clear()
      this.$router.push('./login')
    },
    //获取所有的菜单
    async getMenuList(){
      //发送请求之后会返回一个premiere对象，为了简化premiere操作在前面加一个await和async,紧接着从操作的返回值上解构赋值出一个data属性，然后重命名为res
       const {data:res} = await this.$http.get('menus')
       //console.log(res)
       if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
       this.menulist = res.data
    },
    //点击按钮，切换菜单的折叠与展开
    toggleCollapse(){
      this.isCollapse = !this.isCollapse;
    }
  },
};
</script>
<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between; //两边对齐
  align-items: center; //纵向上居中对齐
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu{
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em; //字体间距
  cursor: pointer;  //鼠标移上变成手形状
}
</style>